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#1
08-01-2012, 04:42 PM
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Sonar Voltage Reading...What are you getting?
I have my HDS unit set to display "Voltage Supplied".
When my starting battery which supplies the power for the HDS is completely charged (12.75 volts at the battery with a multi-meter reading) the HDS will show 12.3 volts. If I turn anything else on in the boat the reading drops to 12.2 volts immediately. The HDS is connected to a buss under the dash. I am going test a couple of different scenarios in an attempt to boost the voltage (dedicated wiring from the starting battery, etc.) My question is what is everyone getting for a voltage reading when your starting battery is fully charged? Thanks In Advance for Your responses.
__________________
This aggression will not stand, Man. JDP 
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#2
08-01-2012, 06:46 PM
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What to have more fun? Change the HDS backlight level and watch the voltage readout.
 On my older Lowrance units, turning the backlight down or off will increase the voltage readout as much as 0.4 volts. Last edited by yarcraft91; 08-02-2012 at 06:02 AM.
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#3
08-01-2012, 07:02 PM
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Quote:
With a supply voltage of 13.0-Vdc as measured on a decent FLUKE multi-meter, my HDS shows the SUPPLY VOLTAGE as 13.2-Vdc. The inference is the HDS is reading about 0.2-Vdc higher than actual. The FLUKE Model 73 is rated as having an accuracy of 0.3-percent on DC voltage measurement. The two readings were made simultaneously. Last edited by jhebert; 08-02-2012 at 06:42 AM.
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#4
08-01-2012, 07:18 PM
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I am an electrician and what you are noticing is probably voltage drop from the battery to the unit. A drop of .1-.2 volts is not uncommon.
__________________
"You cannot help men permanently by doing for them, what they could and should do for themselves." -Abraham Lincoln
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#5
08-02-2012, 03:51 AM
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it was just a spammer guys, they dont pay any attention to the subject matter of the posts
I deleted it and your responses do not respond to those, just ignore it
__________________
Mary had a little pig, She kept it fat and mellow. And when the price of pork went up, Dad shot the little fellow. Mary had a little pig. Her father shot it dead. Now it goes to school with her, Between two hunks of bread.
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#6
08-02-2012, 08:14 AM
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V=IR
The wires between your battery and dash have resistance. The more current you draw through them, the more voltage drop you will have. Is this causing a problem with your HDS? If so, then larger wires (or more wires) between battery and dash will have less resistance resulting in lower voltage drop. Jerry
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